With the following MsgBox:
Call MsgBox("This application requires Microsoft Excel 2007. " _
& vbCrLf & "" _
& vbCrLf & "You must install the Microsoft Office
Compatibility Pack " _
& "in order to use 2007 Microsoft Office documents in
Office XP, Office 2003, and Office 2000. Click on the following link to
visit the Microsoft website that explains the requirements and procedure to
install the compatibility pack." _
& vbCrLf & "" _
& vbCrLf & "http://support.microsoft.com/kb/924074" _
& vbCrLf & "" _
& vbCrLf & "This application will now shut down." _
, vbCritical Or vbSystemModal, "Incompatible Version of
Excel")

Is it possible or must I use a Userform?

Thanks.

Rick